About YiAPI

YiAPI is an AI API gateway and LLM API relay operated by ArcStack LLC. Its public website describes unified access to OpenAI and Claude services through GPT-style request parameters and an OpenAI-compatible /v1 API. Users can create separate API keys in the dashboard, point clients or agents to the YiAPI base URL, track usage and balance, and disable keys independently.

YiAPI uses usage-based billing. Supported models, prices, rate limits, and availability may change and should be checked in the account dashboard before use. The public /v1/models endpoint requires an API key. Support and legal inquiries can be sent to [email protected].

Provider

Why compare

Models

Free

Avg price

Speed

30d uptime

YiAPI

yiapi-ai

YiAPI, operated by ArcStack LLC, is an OpenAI-compatible API relay providing unified access to OpenAI and Claude services with usage-based billing, API-key management, and balance tracking.

Current provider baseline

N/A

100%

Dext API

ai-dext-top

Dext API is an OpenAI-compatible API relay offering access to 500+ LLM models at competitive prices, with multi-channel routing and broad model coverage.

More free-model options
Broader model coverage
Same provider category

343

223

$104.82/M

19 tok/s

88.7%

ai-071129-xyz

MapleLeaf API runs a New API-powered gateway on ai.071129.xyz for aggregated access to multiple AI models.

More free-model options
Broader model coverage
Same provider category

263

292

N/A

38 tok/s

99.2%

ai-chuyel-top

A free, community-supported API service providing access to various AI models for developers and users.

More free-model options
Broader model coverage
Same provider category

250

152

$0.998/M

171 tok/s

90.7%

91vip-futureppo-top

91VIP is a non-profit API service providing access to various AI models including Codex, Claude Code, and Open Code, with specific unlimited-use groups.

More free-model options
Broader model coverage
Same provider category

234

$34.12/M

301 tok/s

0.3%

api-xinjianya-top

Xinjianya API is an OpenAI-compatible API relay at api.xinjianya.top. Service availability may be limited.

More free-model options
Broader model coverage
Same provider category

188

211

N/A

67 tok/s

96.3%

vsllm-com

VSLLM runs a New API-powered AI gateway on vsllm.com for aggregated model access through a single endpoint.

More free-model options
Broader model coverage
Same provider category

120

$255.70/M

184 tok/s

99.7%

Notes

Health checks: Scope: the 72-hour chart and recent availability measure API connectivity only. Each bar summarizes one hour of checks. Targets: LMSpeed tries the configured health check URL and provider status URL first, then API endpoints derived from known API hosts and recent speed-test base URLs. A website host is considered only when it looks like an API endpoint. Probe steps: each candidate goes through DNS lookup, TCP connection, TLS handshake for HTTPS, and an HTTP HEAD request with redirects followed. Probing stops after the first reachable candidate. Reachable criteria: every required network step must succeed. An HTTP response below 500 is treated as reachable, including 401 because it confirms that an authenticated API endpoint responded, except for statuses classified as blocked. Blocked results: HTTP 403, 429, 521, 525, and 530, plus detected WAF or Cloudflare challenges, are shown as blocked and excluded from availability calculations because LMSpeed cannot determine whether the API itself is down. Model availability: when a dedicated test key is configured, LMSpeed sends an authenticated GET request to a derived /models endpoint and compares returned model IDs with this provider's listed models. These per-model results appear in Models & Pricing and are not included in the provider connectivity percentage. Timeouts: TCP connection, TLS handshake, HTTP connectivity, and model requests each use a 20-second timeout. A full run can take longer when several candidates are tried. Frequency: a background worker checks all providers every 5 minutes by default. The 72-hour chart combines those samples into hourly bars, and the schedule may be changed by the service operator. Limit: automated samples are not an SLA and do not guarantee account quota, every model, every region, or successful completion requests. Check the provider's own status page before making operational decisions.

Domain Rating data is sourced from Ahrefs. It is a 0–100 backlink-based domain strength signal and does not measure API speed or reliability.

Announcements and FAQ are read from this provider's NewAPI status snapshot when available. LMSpeed stores the original content and optional English translations from the provider status source, then shows the localized fields on this page.

YiAPI

YiAPI

Billing

API Endpoints

Contact

About YiAPI

Health Check

Recent Test Records

Similar API Provider Alternatives to Compare

Notes

Similar API Provider Alternatives to Compare

Provider	Why compare	Models	Free	Avg price	Speed	30d uptime
YiAPI yiapi-ai YiAPI, operated by ArcStack LLC, is an OpenAI-compatible API relay providing unified access to OpenAI and Claude services with usage-based billing, API-key management, and balance tracking.	Current provider baseline	0	0	N/A	N/A	100%
Dext API ai-dext-top Dext API is an OpenAI-compatible API relay offering access to 500+ LLM models at competitive prices, with multi-channel routing and broad model coverage.	More free-model options Broader model coverage Same provider category	343	223	$104.82/M	19 tok/s	88.7%
ai-071129-xyz MapleLeaf API runs a New API-powered gateway on ai.071129.xyz for aggregated access to multiple AI models.	More free-model options Broader model coverage Same provider category	263	292	N/A	38 tok/s	99.2%
ai-chuyel-top A free, community-supported API service providing access to various AI models for developers and users.	More free-model options Broader model coverage Same provider category	250	152	$0.998/M	171 tok/s	90.7%
91vip-futureppo-top 91VIP is a non-profit API service providing access to various AI models including Codex, Claude Code, and Open Code, with specific unlimited-use groups.	More free-model options Broader model coverage Same provider category	234	10	$34.12/M	301 tok/s	0.3%
api-xinjianya-top Xinjianya API is an OpenAI-compatible API relay at api.xinjianya.top. Service availability may be limited.	More free-model options Broader model coverage Same provider category	188	211	N/A	67 tok/s	96.3%
vsllm-com VSLLM runs a New API-powered AI gateway on vsllm.com for aggregated model access through a single endpoint.	More free-model options Broader model coverage Same provider category	120	2	$255.70/M	184 tok/s	99.7%